The Fiber Optics Illustrated Dictionary - Part 2 fills a gap in the literature by providing instructors, hobbyists, and top-level engineers with an accessible, current reference. From the author of the best-selling Telecommunications Illustrated Dictionary, this comprehensive reference includes fundamental physics, basic technical information for fiber splicing, installation, maintenance, and repair, and follow-up information for communications and other professionals using fiber optic components. Well-balanced, well-researched, and extensively cross-referenced, it also includes hundreds of photographs, charts, and diagrams that clarify the more complex ideas and put simpler ideas into their applications context | Fiber Optics Illustrated Dictionary wet cell called an air cell with carbon electrodes providing an average power of volts. See talk battery. A Block A Federal Communications Commission FCC designation for a Personal Communications Services PCS nonwireline license granted to a telephone company serving a Maj or Trading Area MTA that grants permission for broadcasters to operate at certain FCC-specified frequencies. See band allocations. See FCC-Designated Frequency Blocks chart. A cable A 50-pin data cable commonly used for SCSI peripheral connections. See A connector. A carrier alternate carrier. A Federal Communications Commission FCC designated nonwireline competitive telephone cellular service carrier which is not the established local wireline carrier B carrier . See B carrier. A channel In a system with two or more audio channels . stereo the designation for the left audio channel usually connected to the left speaker or microphone. Audio cables are sometimes color-coded to aid recognition with white conventionally used for the left channel and red for the right. A connector An ANSI-standardized 50-pin electrical data connector for interconnecting SCSI devices such as hard drives cartridge tape drives etc. SCSI and SCSI-2 device connectors are physically different to prevent interconnection but are electrically compatible so that they can be daisy-chained to coexist on the same bus. For some devices manufacturers provide P connector 68-pin to A connector adaptors to enable newer peripherals to be used in older computers. There are also a few P connector-like devices made with 50-pins so that a device can be connected without an adapter. See P connector. A Connector - 50 Pins The slot-style A connector also known as a Centronics connector was popular for years for SCSI devices. Newer formats have mostly superseded it though Centronics-style connectors are still common on older dot matrix printers with parallel connections. A interface See air interface.
